Non-benzodiazepine hypnotic (Z-drug)
Zolpidem and grapefruit: a real interaction?
Grapefruit is famous as the juice that interacts with medications, and the warning is real for a number of drugs. Whether it matters specifically for Zolpidem (Zolpidem) at 5mg, 10mg, 6.25mg CR, 12.5mg CR depends on whether the active ingredient Zolpidem is metabolised by CYP3A4 in the gut wall and how much that pathway contributes to first-pass metabolism.
The CYP3A4 mechanism
Grapefruit (and its juice) inhibits CYP3A4 enzymes in the gut wall, increasing the absorbed dose of medications metabolised by that enzyme. For drugs in the Non-benzodiazepine hypnotic (Z-drug) class that go through CYP3A4 first-pass metabolism, regular grapefruit consumption can raise plasma levels of Zolpidem by a clinically meaningful margin and amplify side effects.
What to do with Zolpidem
According to the prescribing information for Zolpidem, if grapefruit is flagged as an interaction, the safest practice is to avoid grapefruit entirely or to discuss timing with the prescriber. Zolpidem is a positive allosteric modulator of the GABA-A receptor with relative selectivity for the alpha-1 subunit, which is associated with sedation and sleep induction. A small occasional serving may be tolerable; daily large servings around the time of Zolpidem dosing are not recommended at 5mg, 10mg, 6.25mg CR, 12.5mg CR.
Frequently asked questions
Can I eat grapefruit while on Zolpidem? ▾
For some Non-benzodiazepine hypnotic (Z-drug) medications, grapefruit is best avoided or limited because of CYP3A4 inhibition. Whether Zolpidem specifically is affected depends on Zolpidem; the prescribing information lists this. When in doubt, ask the pharmacist or check the patient leaflet.
How much grapefruit is too much with Zolpidem? ▾
For drugs where the interaction matters, even modest daily grapefruit intake (one whole grapefruit or one large glass of juice) can shift drug levels noticeably. For Zolpidem at 5mg, 10mg, 6.25mg CR, 12.5mg CR, individual tolerance varies; the cautious choice is to avoid grapefruit if any interaction is mentioned.
Products containing Zolpidem
More on Zolpidem
- With alcoholZolpidem and alcohol — is it safe to drink?
- With foodShould Zolpidem be taken with food?
- Side effectsZolpidem side effects: common, rare and warning signs
- Dosage guideZolpidem dosage guide: how much to take and when
- OnsetHow fast does Zolpidem start working?
- DurationHow long does Zolpidem last?
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